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| Company Name | Tel | Country/Region | Contact |
| Rieke Metals, Inc. | 402 434 2775 | United States | |
| Rockland Immunochemicals Inc. | 610 369 1008 | United States | |
| RSP Amino Acids, LLC | 978 448 3911 | United States | |
| Rintech, Inc. | 301 987 1980 | United States | |
| Research Organics Inc. | 216 883-8025 | United States | |
| Roche Applied Science | 317 521 9350 | United States | |
| Radiant Pharma & Tech Company | 732 604 7978 | United States | |
| Runherb Corp | 86-18220855851 | China | |
| R&S Chemicals, Inc. | 7042502700 | United States | |
| Rochase Technology Co., Ltd | 0722-3829200 | China | |
| Runherb Inc | 008615389287813 | China |